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          CKE_Tech (Dongguan) Co.,Ltd.

          Professional precision parts CNC cutting high-tech processing

          Hotline:+86769-39022898

          4Common problem

          How should the machining center be properly maintained?


          The price of domestic small and medium-sized processing centers averages around 200,000 to 300,000 (the detailed price depends on the configuration of the equipment). The service life of general machining centers is more than 8-10 years. But not all users' devices can be used for such a long time. It is not entirely a product quality issue. Another key factor is the maintenance and maintenance of the equipment. Many operators only pay attention to the efficiency at hand, but forget the cleaning and maintenance of the equipment after work. So regular inspection of the equipment is a must.

          Compared with traditional machine tools, machining centers have fundamental differences in structure and control, but maintenance and maintenance are similar to traditional machine tools. For most reasons, most users have a lack of normal maintenance, and the disease has caused a large economic loss. According to the service experience of the maintenance personnel of our company working in the field, more than 60% of the problems of the machine tool are caused by the lack of better maintenance, which causes the failure. For these problems, we have introduced the maintenance service of the machine tool, and the machine tool has been carefully maintained. The hidden troubles of the machine are diagnosed and eliminated in advance, so that the machine tool can maintain a good working condition.

          Briefly introduce the daily maintenance and maintenance of the machining center
          The machine tool is maintained from three parts: mechanical part, oil part and electric part.
          1. Mechanical part maintenance

          (1) There are many users who lose the precision of the machine tool after the machine is installed due to grounding, operation errors and other reasons. The first thing we need to do is to strictly check the machine tool level according to the machining center maintenance manual and follow the machining center's operating procedures. Because the level is the basis of machine tool accuracy, it is also the basis for adjusting other indicators of machine tools.

          (2) Adjust the clearance of the iron plug of each shaft of the machine to ensure that it is the gap required by the machining center. Be careful not to rush the adjustment of the iron, unless the level is adjusted. The gap between the table and the saddle is 0.012 mm, the direction of the column is 0.008 to 0.01 mm, and the bar saddle and the column bar is 0.015 mm. Repeat the inspection until the gap values are stable. The purpose is to prevent the iron from unevenly rubbing, reduce the thermal deformation of the machine tool, and ensure the positioning accuracy of the machine tool.

          (3) Check the wear and clearance of the shaft motor and the lead screw, and check whether the bearing at both ends of the shaft is damaged. When the coupling or bearing is damaged, it will increase the noise of the machine operation, affect the transmission accuracy of the machine tool, damage the screw cooling seal, and cause the cutting fluid to leak, which will seriously affect the life of the lead screw and the spindle.

          (4) Adjust the geometric accuracy of the machine tool to restore or meet the requirements of the machine tool. Because geometric accuracy is the basis for the overall performance of the machine. For example, the poor verticality of XZ and YZ will affect the coaxiality and symmetry of the machined workpiece. The poor verticality of the spindle to the table will affect the parallelism of the workpiece. Therefore, the restoration of geometric accuracy is also the focus of our maintenance.

          (5) Check the protective cover of each shaft and replace if necessary. Failure to properly protect the rails can directly accelerate the wear of the rails. If there is a big change
          Shape will not only increase the load on the machine, but also cause more damage to the guide rail.

          (6) Straightening of the lead screw, because some users may cause deformation of the lead screw after the collision of the machine tool or the gap of the iron plug, which directly affects the machining accuracy of the machine tool. We first relax the lead screw and put it in a natural state, then install the lead screw according to the maintenance procedure to ensure that the lead screw is as free from tangential force during the movement, so that the lead screw is in a natural state during processing.

          (7) Check and adjust the belt drive system of the machine tool spindle, adjust the tightness of the V belt appropriately, prevent the machine tool from slipping or throwing during machining, replace the spindle V belt if necessary, and check the 1500rmin spindle high and low gear shifting pulley What is the amount of cylinder oil? If necessary, the lack of oil will cause a failure in the transition of the high and low gears, which will seriously affect the surface roughness during milling and reduce the cutting torque.
          (8) Cleaning and adjustment of the tool magazine. Adjust the rotation of the tool magazine so that it is parallel with the table top. If necessary, replace the circlip, adjust the angle of the spindle directional bridge and the rotation coefficient of the tool magazine, and add grease to each moving part.

          (9) Maintenance of the pneumatic system, cleaning impurities and moisture in the compressed gas, checking the amount of oil in the oil mist separator, checking whether the solenoid valves are working properly, checking the sealing performance in the pneumatic system, because the pneumatic system Good or bad directly affects the tool change and lubrication system.

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